Key-hole guard



No Model.)

B. O. SALTER.

KEY HOLE GUARD.

No. 301,283. Patented July 1, 188.4.

WITNESSES:

N. PETERS. FholwLilhogmphnr. Wnhi gion. n. c.

niirnn Snares PATENT Grricn.

'EDVIN G. SALTER, OF PHILADELPHIA, PENNSYLVANIA.

KEYHOLE GUARD.

SPECIFICATION forming part of Letters Patent No. 301,283, dated July 1,,1884. Application filed February 27, 1884. (No modelJ- '10 aZZ whom itmay concern.-

Be it known that I, EDWIN O. SALTER, a citizen of the United States,residing in the city and county of Philadelphia, State of Pennsylvania,have invented a new and useful Improvement in Lock-Guards, whichimprovement is fully set forth in the following specification andaccompanying drawings, in which 7 Figures 1 and 2 are side elevations,partly sectional, of a lock-guard embodying my invention. Fig. 3 is afront end View thereof. Fig. 4 is a section in line 00 m, Fig.' 1. Fig.5 is a view of the interior of the lock employed.

Similar letters of reference indicate corresponding parts in the severalfigures.

My invention consists of a lock-guard constructed and operatingsubstantially as here inafter fully set forth.

Referring to the drawings, A represents a spindle, which is formed witha bit, B, both adapted to enter akey-hole and body of a lock, and saidbit to engage with the face of a ward or casing thereof.

0 represents a bar, which is connected at its front end with a lock, D,and is free at the other end, and extends parallel with the spindle, soas to enter the key-hole and body of the lock, said lock D having anopening in its casing to permit the passage therethrough of the spindleA, thus supporting said lock D. The spindle is formed with lugs E atintervals, the surfaces whereof are threaded for the engagement of anut, F, which tightens against the lock D. The lock D has within it aspring dog, G, and a stop, G, whereby when the spindle Ais turned thelugE which is inserted in said lock D is engaged by the dog G, andthereby secured, and cannot be moved in either direction, owing to saiddog G and stop G, a key, H, however, being provided for properly movingthe dog G and releasing the lug, whereby the spindle may be turned toregister with the key-hole of the lock D, and thereby withdrawntherefrom.

The operation is as follows: After the bolt has been properly locked andthe key thereof withdrawn, the spindleA is inserted with the bit B aboveinto the look through the keyhole and raised. The lock D is then fittedformed with a bit, B, and a series of lugs, E

on the spindle and pushed in thereon to full extent, thus also insertingthe bar C in the keyhole below the spindle. The spindle is then rotatedby means of a key or handle, (shown in the present case detachablyfitted in a notch in the spindle,)-whereby the lug E which is within thelock D is locked by the dog G and prevented from rotation, it being seenthat the bit B is in the space betweenthe wards or a ward and thelock-casing. The nut F is now screwed on the spindle and tightenedagainst the lock D, thus forcing the bit B against the respective wardand the lock D against the lock-casing, as seen in Fig. 1, wherebyrotation of the spindle from without is prevented. As the bar 0 isimmovable and occupies the portion of the space within the lockcoinciding with the key-hole, should the spindle A be forcibly rotatedto overcome the nut F and the dog G or stop G, the bit B abuts againstthe bar 0, whereby the spindle cannot be pushed out of the key-hole.\Vhen the nut F is loosened and the key H properly inserted in the lockD and rotated, it disengages the dog G from the lug E, whereby the lockD may be removed from the spindle, carrying with it the bar 0. Thespindle may then be rotated to cause the bit B to coincide with thekey-hole, thus permitting the withdrawal of the spindle and clearing thekey-hole for the introduction of the key of the lock proper.

In order to adjust the bar 0 to smaller looks, I form the same of partshinged together, so that the one may be folded within or on the other,and thus reduce the length of the bar.

The plate D of the casing of the lock D covers the key-hole, and isforced against the wall thereof by the nut F; hence the insertion of apiece of wire or an implement from without to reach the nut and loosenit is prevented.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In a lock or key-hole guard, a spindle a lock which is fitted on saidspindle and has its bolt or dog adapted to engage with one of mo thelugs E, and a bar connected with said lock, substantially as and for thepurpose set forth.

2. In alock or key-hole guard, a spindle 5 formed with a bit, 13, and aseries of screwthreaded lugs, E, a lock fitted on said spindle andhaving its bolt or dog adapted to engage with one of the said lugs, abar connected with said lock, and a nut fitted on the lugs of thespindle, said parts being combined and oper- 1o ating substantially asand forthe purpose set forth.

EDWIN C. SALTER.

WVitnesses: I

JOHN A. WIEDERsHEIM, A. P. GRANT.

